<template>
  <div>
    <div id="slider" class="mui-slider">
      <div
        id="sliderSegmentedControl"
        class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted"
      >
        <div class="mui-scroll">
          <a
            :class="['mui-control-item',item.id==0? 'mui-active':'' ]"
            v-for="item in cates"
            :key="item.id"
            @tap="getPhotoListByCateId(item.id)"
          >{{item.title}}</a>
        </div>
      </div>
    </div>

    <ul class="photoList">
      <router-link :to="'/home/photoInfo/'+item.id" tag='li'  v-for="item in list" :key="item.id">
        <img v-lazy="item.img_url">
        <div class="info">
          <h1 class='infoTitle'>{{item.title}}</h1>
          <div class='infoContent'>{{item.zhaiyao}}</div>
        </div>
      </router-link>
    </ul>
  </div>
</template>

<script>
//导入mui js 文件
import mui from "../../lib/js/mui.min.js";

export default {
  data() {
    return {
      cates: [],
      list: []
    };
  },
  created() {
    this.getAllCategory();
    this.getPhotoListByCateId(0);
  },
  mounted() {
    // 当 组件中的DOM结构被渲染好并放到页面中后，会执行这个 钩子函数
    // 如果要操作元素了，最好在 mounted 里面，因为，这里时候的 DOM 元素 是最新的
    // 2. 初始化滑动控件
    mui(".mui-scroll-wrapper").scroll({
      deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
    });
  },

  methods: {
    getAllCategory() {
      this.$http.get("api/getimgcategory").then(result => {
        // console.log(result.body);
        if (result.body.status === 0) {
          result.body.message.unshift({ title: "全部", id: 0 });
          this.cates = result.body.message;
        }
      });
    },
    getPhotoListByCateId(cateId) {
      this.$http.get("api/getimages/" + cateId).then(result => {
        if (result.body.status == 0) {
          // console.log(result.body);
          this.list = result.body.message;
        }
      });
    }
  }
};
</script>

<style lang='scss' scoped>
* {
  touch-action: pan-y;
}
.photoList {
  list-style: none;
  margin: 0;
  padding:10px;
  padding-bottom:0;
  li {
    background-color: #ccc;
    text-align: center;
    box-shadow: 0 0 9px #999;
    margin-bottom:10px;
    position: relative;
    img {
      width: 100%;
      vertical-align: middle;
    }
    img[lazy="loading"] {
      width: 40px;
      height: 300px;
      margin: auto;
    }

    .info{
        text-align: left;
        position: absolute;
        background-color: rgba(0,0,0,0.4);
        color:white;
        bottom: 0;
        max-height: 84px;
        .infoTitle{
            font-size:14px ;
        }
        .infoContent{
            font-size: 12px;
        }
    }

  }
}
</style>
